発生ガス分析法によるCoFe2O4の炭素熱還元に関する研究
1986 年 50 巻 1 号 p. 71-76
詳細
1986 年 50 巻 1 号 p. 71-76
The present study is concerned with the kinetics of carbon reduction of CoO and CoFe2O4 by the effluent gas analysis method. The results are as follows:
(1) The reduction of CoO starts at about 1163 K, and the activation energy is calculated to be 236 kJ/mol.
(2) At an earlier stage of reduction of CoFe2O4, the reduction of CoO in CoFe2O4 occurs to yield metallic cobalt. The activation energy of 243.6 kJ/mol nearly equal to that for the Boudouard’s reaction is obtained.
(3) The clear observation and analysis of the reduction product of CoFe2O4 are successfully conducted by the non-aqueous electrolyte-potentiostatic etching method (abridged as SPEED method). In addition, X-ray diffraction and EPMA examination are also used to identify the phases formed.
